A pot experiment with eight wheat varieties from Henan province was conducted to investigate the genotype differences in N efficiency at two rates of N supply. The results showed that the grain yields of all varieties increased significantly with the increase of nitrogen application.The increasing rates were related to the variety sensitivity to N.The difference of N efficiency was obvious among the 8 wheat varieties.The N efficience of Zhengmai 004,Taikong 6,Zhengmai 9023,Zhoumai 16 and Yumai 50 were very high at low N and high N.Path analysis indicated that N efficiency was determined mainly by N uptake efficiency at low N condition,but by both N uptake efficiency and N utilization efficiency at high N condition.
GUO Zhan-ling
,
SHEN A-lin
,
KOU Chang-lin
,
MA Zheng-hua
,
WANG Shou-gang
. Differences of Nitrogen Efficiency in Henan Wheat Varieties[J]. Acta Agriculturae Boreali-Sinica, 2009
, 24(2)
: 185
-189
.
DOI: 10.7668/hbnxb.2009.02.038
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